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Lithographic offset press and lithographic offset press printing method

a technology of offset press and offset press, which is applied in the direction of transfer printing, rotary lithographic machines, intaglio printing presses, etc., can solve the problem of not easily sticking, and achieve the effect of facilitating separation

Inactive Publication Date: 2009-04-28
DOMOTOR JULIUS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]Moisture applied to the blanket cylinder is employed to facilitate separation between the paper or other printable sheet material and the blanket cylinder when ink is transferred to the paper or other printable sheet material.

Problems solved by technology

Furthermore, the blanket cylinder stays cleaner than when conventional approaches are employed, and paper particles do not readily stick to the blanket cylinder.

Method used

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  • Lithographic offset press and lithographic offset press printing method
  • Lithographic offset press and lithographic offset press printing method
  • Lithographic offset press and lithographic offset press printing method

Examples

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Embodiment Construction

[0023]FIG. 2 illustrates a typical offset lithography press, the press including a rotating plate cylinder 10 which carries the image, a blanket cylinder 12 which transfers ink to paper, and an impression cylinder 14 which carries paper 16 that receives ink from the blanket cylinder. The press also includes an inking unit 18 having an ink fountain 20 and an ink supply roll 22. As is conventional, a plurality of inking unit rollers are in operative association with the rotatably driven plate cylinder 10 to selectively deliver ink from the ink fountain and ink supply roll to the plate cylinder. The physical make-up, configuration and numbers of these rollers in an inking unit vary in prior art arrangements.

[0024]The prior art arrangement shown in FIG. 2 also includes a dampening unit 24 including a water supply 26 and rollers for applying moisture to the plate cylinder upstream of the inking unit. The moisture is typically in the form of a thin water layer that adheres to a non-printi...

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PUM

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Abstract

An offset lithography printing press and method wherein dampening structure applies a thin moisture layer directly to a blanket cylinder to facilitate separation between the blanket cylinder and paper or other printable sheet material when passing through a nip between the blanket cylinder and an impression cylinder.

Description

TECHNICAL FIELD[0001]This invention relates to the field of offset lithography, and more particularly to an offset lithography press and a lithographic offset press printing method.BACKGROUND OF THE INVENTION[0002]The operation of lithographic printing presses involves an interaction of water and ink and the inking system of the lithographic printing presses has not changed to any appreciable degree since the invention of the offset lithographic press in the early twentieth century.[0003]My co-pending U.S. patent application Ser. No. 11 / 514,002, filed Aug. 30, 2006, relates to an offset lithography press and method for improving the performance of an offset lithography press wherein misting is virtually eliminated even at very high operational speeds.[0004]While the invention disclosed in the above-identified application effectively solves misting problems, conventional offset lithography presses have another drawback relating to the dampening systems employed.[0005]On a conventiona...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B41F7/02B41F7/24
CPCB41F7/26B41M1/06
Inventor DOMOTOR, JULIUS
Owner DOMOTOR JULIUS
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